Printing press



Dec. 16 1930. H. RQTROTTER 1,785,505

PRINTING PRESS Filed Dec. l0. 1928 2 Sheets-Sheet 1 H. R. TROTTERPRINTING PRESS Dec. 16, 1930.

Filed Deo. 10, 1928 2 Sheets-Sheet 2 FaltenfediV 11930 y, n,

COMPANY-,for cHrcAGo, ILLINoIsgA:oonroaaTIoNloF Y:,"LLINoIs Y x.Application `filed -December My invention relates ztoipr'intingvpresses that employ Vcomplemental printing members atleast one' of whichis inthe'formofja rotating cylinder, theprinting form beingl .carried byone ofvsaid members and Vbeing subject to printing pressuregfrom theother member. provision of an improved assemblageof a risket with suchapress inconjunction With Q controlling means for the vfrisketWherebyits adjustment with respect to the form may be automaticallycontrolled. As I have em-` bodied my invention the press may be operated as simply as though the risketfwere ab- 15 sent. The presentinvention is an improvement upon the invention forming the subjectmatter of myYco-pending application Serial No. 324,925 filed'of even,datef'herewith.

In carrying out the invention disclosed in 4 20 myV aforesaid co-pendingapplication, I in i terpose the frisket between the printing mem- 1 bersand space a portion o fgitfrom' the form bearing printing memberandipass'thisportion betweenthe cylinder and the kin'lfring.

Y mechanism if such be employed. Inthefspeciic embodiment oftheinvention of saidlco pending application, theY frisket is providedWith relatively movable'l anchorages atfits ends. In carrying out mypresent invention the frisket is mounted, at its'ends, uponfrelativelyXed anchorag'es. In'tle preferred embodiment of the invention thecylinderlturns upon a ixed axis in each of its operations, the printingmember complemental thereto is in i '35 the form of a reciprocating bed,to the ends or longitudinally spaced' apart portions of Whichthe ends ofthe fr-islret are attached, and the inking mechanismand the cylinder lare normally spaced a 'substantially unchang- 40 Ving distance apart.The frisket is desirably in the form of a flexible sheet which isreadily conformable to the curvature ofthe cylinder, 1 a positionerbeingprovided for the frisket in-k l termediate its ends thatmaintains.the afore .45 said frislzet portion spaced apart'from the The inventionhas for its object the y akiagi meianisfmi miY 'the ferm bearing Y whichFigiv lis' "a longitudinal elevation-,par-

randa-nee with my invenaen Fig. eingeplanview-ofthe pressshown inFiglFig. Bisa' Simplified'Y'vife\'7v,`y .partially finsection', and

` essentially diagrammatic, yportioiisf being relV f' moved ,andgis'afview sim'ilarto Fig." 3

` but showin'gfpartsin changed positions.

- f Ylhe mai'nfsupporting fra-melf of thepress HENRY RQTROTTER, orCHICAGO', rLvLINoisfAssieNoR froirAenna1i:ANUriiccrUaINeVV f referencetothe accompanyil'ig t dravvingsin ftiallyi'nfsectionv ofja press fequippedriniac-j includesa :suitable'pedestal2.',` Upright siipv ports14 carryth'e" rotating tfshatg `6 'of i the :6,0 printing cylinder?,these supportsfdeninga w f substantially ''iixed axis'of "rotationfor-*the erationsL4 lt is lto 44be" Iunderstood,"however, that theinvention yisn'ot to be limited vto a` -Arablei'icharacter.

r '."llheiillltng usual bearers i13 at thev sides et .thep'ress andthebed isl provided vvith the usual bearers "13', also atthesidesoff'the press, rupon which wthe bearers13` roll` as the vbed ismovedin 'c'yhniderwhoseams is thus fixed; `The` press illustrated Nis ahand operated proofpress f 1 cylinder in the printing and nonprintingop1` "each printin'goperation, 'these bearers, when contact'iirng,l.defining l"the normal printing "space between the printing members 7and 'K10'.`r- V"ThejprintingA cylinder isf lowered-for "theprintingjstro 'e and raised orthe non- .'printingfstijolife,V the .cylinder)v/'hen lowered ,exerting'printing pressure `uponthe:paper sheet? thatisjpas'sing `between thej tvvo printing mmbfs?, A Suitablmhanismrmaymplbyefisifo? misma @ndloweiihsfrhe cylinder i`s` pr ovided with thecludes a shaft lkgwhich' has a fixed axis of? shaft carries circularcams l that'are eccenft-he-.upright cylinder supports` 4 which are v dVdirectly'carried by said cams. A handlel Vprinting relation to the ornnTheV frisket'QO. .hasone or l ider andthe bed. *A positioneiyintheform'f 18 Which are carried upon; the side vsupportsv be printed uponto V,contact"Withthe fformel1.

'readily ,conformable tothe curvature of .the

l Grids y 0f; the Side Supports 19e-engages the ff il frisket between`its ends, being kso Vlocated as Without interferencel from .the .frisketpor;-

may be applied to: the form fwith'out vinterfresults beingautomatically,effected; during Y cylinder. The ymechanism .illustratedsaid members being a rotatable cylinder, the

p printing forni being carried by one of Vsaid rotation upon the trarneof 'theppress This n p Surefromthe other memben'a'frisketintertric tothe shaft. .'Thefsecains Work Within posedbetweensaid printing membersand elongated openings-l 16 that areform'ed in' having relatiyexedanchiorages at 'its ends,

l including said cylinder.

is fixed upon thesh'aft'li'rwhereby the cyl. In witness whereof, Ihereunto subscribe inderzlsup'ports lellnayvbezlowered 'andelemynaine-'fl Y i Vat'edcto@ringmthefcylinder fintojandjlout ofenV '2 1'gfvriI- IENRY'Rf-TR'OTITER.

Anylsuitable form of inkingfmechanism' illustrated is inclusivelaofzthe.inkinggrollersg,i'VA A' V19, these sdesupports being bolted t'othe' lfframe of the press `incasethge inliing nieehp 1 anism is to be heldstationary't be'norrna'lly' l f spaced a5 ubstan'tially ,unchangingdistance from the cylinder. A g

' y moreopeningsl V therethrough to permit p thel vsheet' that is toraiefriskeeis.previene-withenemy exea' ff anchoregew item15.'ltiprferablyfan* choredto 4the ends ofY the reciprocable :bed

otfthe 'frisket is attached toa bar QQ'upOn posts 23that are carried bythe bed and vser-vesto elevate the portiolnnof the frisket to therightof the cylinder above the bed.; The Y risket yis preferably ai:flexible sheet 'that Vis ylinderfwhere itf Vpasses 'betweeni the cylinaroller 241that is journaled'uponthe upper j to maintain'the portion lofthe frisket that'j f "gf .is V-betm'eenfthe cylinder andthe inkingInechi ,anisni spaced apart 'troni/ the ginlingfinechanism. (The bedcauses the rislietto travel] therewith. The frisket opening 21and the Minlgi'ng niechanisni'areso y inter-relatedthat the,iinkingv-mechanism,InayQinkthe form tion um is` above it andfsotha'nhenfrisket jference front the inkingr Tinechaiiisml,'Vi these i e{theoperation of thepress.V l Ineiectthe fris- VThe printing cylindergraduallyilays the' frisl ket up-onthe .form as the'printinggproceedsQ-ket during thenon-printing Strokeji*l g j jlf'zlaim'rw 'A Printing ingv printingfIfnembers, betwyeemlwhich the sheet to be printed upon isreceived; one of ket isautornatically elevatedtocleartheinkingmechanisrn during :the'orm inking oper- 'ation and lisautonnatieally lowered `inprepf Y aration forandlduringfthegprintingstroke. I` 'i' and gr adually l permits elevation of .the fris-Vprlefsfindudiiigwe cbepera-'i members and being subject to printingpresand risket positioning nieans]- said means iis

